Heat oven to 400°F.
Glaze a muffin tray with butter, and place tortilla bread in each mould. Lightly glaze bottom of placed tortilla bread with butter and place a frozen Croquette.
Add onions, garlic, a pinch of salt, black pepper powder, green chili, cheddar cheese and spinach to each bread.
Place an extra frozen Croquette and top with some cheese.
Add a slice of red bell pepper on each tart, and bake for 20 minutes.