Easy
I’ve used this recipe before but it’s so good I keep coming back to it. It’s your Yom Tov staple.

1 5-6 pound brisket
1 onion, sliced
2 tablespoons paprika
1 can tomato soup

Preheat oven to 350 degrees F. Place brisket in roasting pan and cover with the remaining ingredients in the order listed. Bake for 3 hours until soft, checking halfway through to see if you need to add any water ( but you shouldn’t). If not for immediate consumption, allow brisket to cool, then slice. Return meat to gravy for reheating