Zucchini and Red Pepper Frittata - The Scramble

Ingredients

• 1 Tbsp. extra virgin olive oil
• 1 Tbsp. butter
• 1 red onion (halved and thinly sliced)
• 1 zucchini (halved lengthwise and cut into thin semi-circles, or use spinach, mushrooms, or asparagus)
• 1 red, orange, or yellow bell pepper (diced)
• 10 eggs (lightly beaten)
• 1 cup grated Swiss, Gruyère, or Fontina cheese
• 1/4 tsp. salt (or to taste)
• 1/8 tsp. black pepper (or to taste)
• 1 tsp. dried or fresh rosemary