Perfect onions: Use a mandolin if you have one to slice the onions finely, or a sharp knife if not. The longer you caramelize the onions, the richer the onion gravy will taste. Cook them to light, medium or even dark brown, 10 to 20 minutes.
Don't overcook the beef: You just need to brown both sides of the patties, not cook it through, as the beef continues to cook in the gravy.
Browning the gravy: You can add Kitchen Bouquet browning sauce to make your gravy look more brown.
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