Brown the ground beef with the chopped onion and garlic, drain the grease and return pan to burner.
In another pan mix the mushroom soup with the corn and green beans. Add mixture to the ground beef and fold in until incorporated.
Pour mixture into casserole dish and bake, covered, in a 350°F oven for 20 minutes.
Remove from oven, remove cover and sprinkle chow mein noodles on top of the casserole. Return to oven and continue baking another 15 – 20 minutes until bubbling and golden.