Braised Beef Heart - cooking recipe

Ingredients

3 lbs beef heart
3 tablespoons onion soup mix
1 cup water
2 tablespoons vegetable oil
1 medium onion
1 teaspoon prepared mustard
1 cube beef bouillon
1/2 cup breadcrumbs

Preparation

Trim any fat off the heart. Use a pair of kitchen scissors to cut off any large pieces of the connective tissue around the top of the meat.
Roll into a roast form and tie with string.
Brown in the oil on all sides.
Put in a dutch oven and add the onion, cut into about 8 pieces, and all the other ingredients, except the bread crumbs.
Bring to a boil, reduce heat and simmer for 4 hours, turning every hour.
After 2 hours, add the bread crumbs.
When done, remove heart and use an immersion blender or regular blender to smooth the gravy. If desired, you can thicken the gravy some more with a water and flour mixture, bringing it to the boil.
Slice the heart lengthwise into 1/4\" slices.