Any left-over veggies, meat or chicken can be spooned into the bottom of the cups or bowls. Use about 80-100 ml of filling per cup.
Substitute the baby marrow for small broccoli florets or use 125 g mushrooms, sliced.
Left-over or tinned fish will also be delicious. Try tuna with the baby marrows or just spoon pilchards in tomato sauce into the bottom of the cups.
Prepare a light meal by using slightly bigger bowls and adding two eggs to each container.