Baked Denver Omelet

Ingredients

• 1/2 cup chopped red bell pepper
• 1/2 cup chopped green bell pepper
• 1/3 cup chopped yellow onion
• 2 tsp olive oil
• 1 cup (heaping) chopped cooked ham
• 8 large eggs
• 1/3 cup milk
• Salt and freshly ground black pepper
• 1/2 cup shredded sharp cheddar cheese
• Sliced avocados (, for serving (optional))
• Chopped chives and hot sauce (, for serving (optional))