Cherry tomatoes are often cheaper per pound than large tomatoes and add better texture and sweetness to baked egg dishes. If small mozzarella balls are not in your budget, a block of regular mozzarella diced small works identically and is usually less expensive per ounce. Fresh basil can be pricey in small packets — if you go through recipes like this often, a basil plant on a windowsill pays for itself within a few uses and never goes to waste.