Frittata Florentine

Ingredients

• 1 red onion (chopped)
• 1 clove garlic (minced)
• 1 tbsp olive oil
• 2 plum tomatoes (diced)
• 1 pepper (red or green, diced)
• spinach (or arugula, large handful, chopped)
• 1/2 cup sweet corn (frozen, thawed)
• 8 eggs (beaten)
• Parmesan cheese (grated)