Mom'S Pot Roast - cooking recipe

Ingredients

3 -4 lbs pot roast
2 tablespoons oil
1 tablespoon mustard
1 1/2 teaspoons brown sugar
1/4 cup water
1/4 cup vinegar
2 -3 large onions, sliced
salt, pepper
flour, to thicken gravy (optional)

Preparation

In a Dutch oven, brown the pot roast in the oil.
This will take about 15 minutes to get all surfaces browned.
Add the remaining ingredients and bring to a boil.
Lower the heat and simmer very slowly for 3 hours.
Take the roast out and keep warm.
Strain the gravy (serve the onions as a side dish).
Mix the flour with water and thicken the gravy if desired.