A — Water bath method (my preferred foolproof way)
Mix steel cut oats, water, almond milk, mashed banana (or applesauce), and pinch of salt in a heat-resistant bowl or small casserole dish. Stir well.
Place the bowl (or mason jars) into the slow cooker. Fill the slow cooker halfway with hot water so the dish sits in a water bath.
Cover and cook on low for 4 hours for creamy oats. For thicker oats, cook up to 5 hours on low.
Serve: Divide into 4 bowls and decorate with fruit, nuts, or nut butter. If you used jars, serve them right in the jars.
B — Direct slow cooker method (no water bath)
Spray the slow cooker bowl with cooking spray or line with a slow cooker liner.
Combine oats, water, plant milk, mashed banana, and salt directly in the slow cooker. Stir.
Cook on low for 4–5 hours, checking at 4 hours for creaminess.
Stir before serving and add toppings.
Pro tip: If you cook overnight, switch the slow cooker to warm after 4 hours to keep the texture perfect until breakfast.