A very simple tart with only a handful (or two) of ingredients. We keep it simple with just ricotta, herbs, and spices, but you can top it with other items, such as microgreens, grilled or sautéed vegetables, etc. If you need a quick appetizer, skip the pastry dough and just make the filling to serve as a dip for veggies or as a spread on toasted baguette slices.