Sliced Swiss cheese, cut lengthwise into 1-inch strips
Cook bacon until transparent and partially brown. Remove bacon from skillet, reserving 1 tbsp drippings in skillet. Drain bacon on paper towels and set aside.
Sauté onions in reserved drippings until just tender. Combine onion, eggs, milk, salt, pepper, and garlic in bowl; mix well.
Pour egg mixture into a lightly buttered 1 1/2 quart casserole. Top with cheese strips and bacon.
Bake at 350° F. for 40 minutes or until set. Serve immediately.