All-Time Favourite Apple Crisp

Ingredients

• 2 tbsp (30 mL) plus 1/2 cup (125 mL) packed light brown sugar
• 2 tbsp (30 mL) plus 1/3 cup (75 mL) all-purpose flour
• 1 tsp (5 mL) cinnamon
• 3/4 tsp (3 mL) salt
• 1 vanilla bean (about 5 inches / 12.5 cm long) OR 1 tsp (5 mL) vanilla extract
• 3 tbsp (45 mL) fresh lemon juice
• 3 lbs (1.5 kg) baking apples
• 1/2 cup (125 mL) old-fashioned oats
• 6 tbsp (90 mL) cold margarine, cut into pieces
• 1 L frozen non-fat vanilla yogurt