Spinach and goat cheese quiche minis

Ingredients

• 10 roma tomatoes, sliced in half from stem to stern
• 1-2 T olive oil
• Kosher salt and pepper
• 1 T butter
• 1 cup onion, chopped
• 5 eggs
• 1 10-ounce package frozen cut spinach, thawed and drained
• 6 ounces goat cheese
• 2 cups cream
• 1 t salt
• 1/2 t red pepper flakes
• Pepper to taste