Frittata, Tomato and Zucchini

Ingredients

• 3 tablespoons olive oil
• 1 large onion, chopped
• 1 small zucchini, halved, sliced
• 1 small crookneck squash, halved, sliced (see note)
• 2 teaspoons minced garlic
• 8 eggs
• 3/4 teaspoon dried oregano
• 1/2 teaspoon dried dill
• 1/2 teaspoon salt
• 1/4 teaspoon freshly ground pepper
• 2 oz. (1/2 cup) crumbled feta cheese
• 1 medium tomato, sliced