Easy Sauteed Vegetables

Cut the onion, bell peppers, yellow squash, and zucchini into 3/4-inch pieces.
Heat the oil in a wide skillet over medium-high heat until the oil is shimmering.
Stir in the onions. Cook, stirring around the pan, for one minute.
Add the remaining vegetables (bell peppers, yellow squash, and zucchini). Cook, tossing occasionally, until tender, 4 to 6 minutes.
Stir in the garlic, butter, 1/4 teaspoon salt, and 1/4 teaspoon fresh ground pepper, and cook for one minute. Serve.

Ingredient :

1 tablespoon olive oil
1 small onion
2 medium bell peppers
1 medium yellow squash
1 medium zucchini
1 tablespoon minced garlic
1 tablespoon butter, optional
Salt and freshly ground black pepper