Crockpot Swedish Meatballs

Ingredients

• white bread

  finely chopped
  4 slices
• lean ground Beef
  2 lbs
• egg yolks
  4 unit
• chopped fresh parsley
  4 tablespoons
• dried Onion flakes
  2 tablespoons
• salt
  1 teaspoon
• mustard powder
  1 teaspoon
• ground ginger
  1 teaspoon
• garlic powder
  1/2 teaspoon
• ground black pepper
  1/2 teaspoon
• condensed French Onion soup
  1 can
• all-purpose flour
  1/4 cup
• sour cream
  1/4 cup
• sauce
  1 tablespoon