Fall Apart Beer Brisket

Ingredients

• 1/2 tsp salt
• 2 Tbsp cider vinegar
• 2 Tbsp canola oil
• 2 tsp minced garlic
• 1 tsp dried thyme leaves
• 1 1/2 tsp dried oregano leaves
• 1 1/2 lbs trimmed beef brisket
• canola oil cooking spray
• 1 1/2 cups diced onion ((about 1 large onion))
• 12 oz dark stout beer
• 3 Tbsp steak sauce
• 3 Tbsp no-salt-added tomato paste
• 6 multigrain bread slices