Slow Cooker Mongolian Beef with Brown Rice and Steamed Broccoli

Ingredients

• 2 pounds beef flank steak or sirloin, thinly sliced against the grain
• 1/4 cup cornstarch
• 1 tablespoon olive oil
• 1/2 cup soy sauce
• 1/2 cup water
• 1/2 cup brown sugar, packed
• 1 tablespoon fresh ginger, grated
• 4 cloves garlic, minced
• 1 teaspoon red pepper flakes (optional, for heat)
• 2 cups uncooked brown rice
• 2 1/2 cups fresh broccoli florets
• 2 tablespoons sesame seeds (optional, for garnish)