You will need a large 6-quart Crockpot for this recipe...and preferably an oval-shaped for even heating.
Wash, peel and slice apples into the Crockpot. Squeeze the juice of 1 lemon over the apples, being careful to remove any seeds, and gently toss.
Pour sugars, cinnamon and nutmeg over apples; toss gently to combine ingredients.
Place lid on Crockpot and cook on LOW for 5-6 hours, stirring 2 -3 times.
When apples are cooked and soft, smash with a potato masher or an immersion blender for your desired consistency.
Store in refrigerator, or freezer. You may also place in small jelly jars and process in a hot water bath to can/preserve.