TL;DR
- 166 kcal · 5.2 g protein per serving
- Ready in 6 min · serves 4
- Vegetarian, Gluten-free, High-fiber
Zucchini and tomatoes is the kind of dish that quietly defines American summer cooking: a single pan, a handful of peak-season vegetables, and about twenty minutes between craving and dinner. It is not a composed plate or a technique showcase—it is a home-style side dish, the sort of thing that appears next to a piece of grilled chicken or a fillet of fish and makes the whole meal taste like the season. The formula is simple enough to memorize: butter, onion, garlic, zucchini, tomatoes, salt, pepper, and a teaspoon of sugar to coax out the tomatoes' natural sweetness. Nothing about it is fussy, and that is precisely its strength.
For anyone tracking calories, this dish earns its place at the table for structural reasons rather than nutritional gimmicks. The two main ingredients are vegetables, which means the bulk of the plate is water and fiber—zucchini is famously low in energy density, and tomatoes bring their own juiciness to the pan. The only added fat is the two tablespoons of butter, which is there to carry flavor and help the onions soften, not to drown the vegetables. The onion and garlic build a savory base without needing stock or cream, and the seasonings are pantry staples. Because the recipe is built around a pound of zucchini and just two tomatoes, the portion structure naturally lands as a generous vegetable side for two to four people, which makes it easy to fill half the plate without thinking about it. The teaspoon of sugar is a flavor-balancing move, not a sweetener; it rounds out the acidity of the tomatoes and the slight bitterness that zucchini can develop when cooked. In plain terms: this is a dish that lets vegetables be the main event, with fat and seasoning used as tools rather than the point.
A few practical notes make the difference between good and great here. The step that matters most is the one that seems least important: cooking the onion and garlic in the butter until tender, about five to seven minutes, before adding the zucchini and tomatoes. Rushing this stage leaves raw, harsh garlic and crunchy onion in an otherwise soft dish—give it the full time, stirring occasionally, and the whole pan will taste sweet and mellow. When the zucchini and tomatoes go in, resist the urge to stir constantly; the cover and reduced heat are what steam the vegetables to tenderness, and too much stirring breaks the tomatoes into mush. If the tomatoes are especially watery, a few extra minutes uncovered at the end will let the juices concentrate. The dish keeps well in the fridge for two or three days and reheats gently on the stove or in the microwave, though the zucchini will soften further on the second day—still delicious, just less firm. For a variation, a sprinkle of fresh basil or parsley at the end brightens everything up without changing the structure of the recipe.
Ingredients — For 4 servings
- 2 tablespoons butter (or cooking oil of your choice) 28 g
- 1/4 cup onion (chopped) 40 g
- 1 piece garlic clove (minced) 3 g
- 1 pound zucchini (sliced) 454 g
- 2 piece tomatoes (peeled and diced, or a 16 ounce can of diced tomatoes, drained) 246 g
- 1/4 teaspoon salt 1 g
- 1 piece black pepper (to taste) 120 g
- 1 teaspoon sugar 4 g
Nutrition per serving
166 kcal
| Protein | 5.2 g |
|---|---|
| Carbohydrates | 27.3 g |
| of which sugars | 6.1 g |
| Fat | 7.2 g |
| of which saturates | 4.1 g |
| Fiber | 9.6 g |
| Sodium | 163 mg |
Nutrition computed from USDA FoodData Central per-ingredient data (curated reference table, engine/systems/recipe/data/ingredient_nutrition_db.json).
Instructions
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Wash your hands with soap and water before you begin, and rinse any fresh produce you'll be using.
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Melt butter or oil in a saucepan over medium heat.
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Add onion and garlic.
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Cook until tender, about 5 to 7 minutes.
~6 min -
Add zucchini, tomatoes, and seasonings.
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Cover pan, reduce heat, and cook until vegetables are tender.
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Get Kaloria freeFrequently asked questions
Can I use olive oil instead of butter?
Yes. The recipe calls for butter for flavor, but olive oil works just as well for the cooking method. Use the same amount and let the onions and garlic soften in the oil over medium heat before adding the zucchini and tomatoes. The dish will taste slightly different but still delicious.
Why does the recipe include a teaspoon of sugar?
The sugar is not meant to make the dish sweet. It balances the natural acidity of the tomatoes and helps round out any bitterness from the zucchini. If your tomatoes are very ripe and sweet, you can skip it or use a pinch instead.
Can I make this ahead of time or store leftovers?
Yes, this dish keeps in the refrigerator for two to three days in an airtight container. Reheat gently on the stovetop or in the microwave. Note that the zucchini will soften further upon reheating, so it is best enjoyed within a day or two of cooking.
What should I serve this with?
This side dish pairs well with grilled meat, fish, or tofu, as the original recipe suggests. It also works nicely alongside pasta, rice, or crusty bread to soak up the tomato juices. For a lighter meal, add a protein like white beans or chickpeas to make it a main course.
Do I need to peel the zucchini or seed the tomatoes?
No. The zucchini skin is tender when cooked and holds the pieces together nicely, so leave it on. The tomatoes are added in pieces with their seeds and juice, which create the pan sauce. Just rinse the produce well before starting.
Sources
- USDA MyPlate Kitchen — Recipe adapted from USDA MyPlate Kitchen.
- USDA FoodData Central — Nutrition panel computed from USDA FoodData Central per-ingredient data via a curated reference table.