Preheat oven to 400 degrees. Spray muffin tin with nonstick vegetable cooking spray or line with baking cups. Blend the egg, tomato sauce, and buttermilk or yogurt with a mixer or food processor. Add the spices. Add the cheese, reserving 1/4 cup for topping. In another bowl, mix the flour, wheat germ, baking powder, and baking soda. Combine the two mixtures until four is no longer visible. Spoon batter into muffin tin, filling each well about 2/3 full. Top each muffin with a slice of tomato and some cheese; sprinkle with sesame seeds. Bake 20-25 minutes.