Preheat oven at 375°F

Cook tortellini/ravioli according to package directions.

In Dutch oven, add 4 tbsp butter and melt. Then combine 2 cans French onion soup and 2 cans beef consumme.

Combine 4 tbsp cornstarch and 4 tbsp water, mix. Add to Dutch oven.

Bring to boil, simmer until thickened to desired consistency. Add tortellini/ravioli.

Add mixture to oven-safe container. Top with Gruyere cheese. Bake for 10 minutes, until cheese is melted.