Beef Stroganoff

Ingredients

• 1 1/2 Tbsp. flour
• 1 1/2 lb. beef sirloin strips
• 1/2 lb. sliced mushrooms
• 1 clove garlic, minced
• 1/4 c. flour
• 1 1/2 c. beef stock or 2 bouillon cubes (can broth)
• 1 c. sour cream (at room temperature)
• 1 tsp. salt
• 2 Tbsp. butter
• 1/2 c. chopped onion
• 2 Tbsp. butter
• 1/4 c. tomato sauce