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Holiday Weekend Feast: Just 4 ingredients. I throw this together early so I can enjoy the beautiful May weather outside
Lightly coat the inside of a large slow cooker (5–6 quart) with nonstick spray or a thin film of oil to help prevent sticking and make cleanup easier.
Spread a thin layer (about 1/2 cup) of the marinara sauce over the bottom of the slow cooker; this keeps the dry manicotti from sitting directly on the hot surface and helps them hydrate evenly.
In a medium bowl, stir together the ricotta cheese and 1 cup of the shredded Italian blend or mozzarella until well combined. You don’t need eggs or extra seasonings for this version—the sauce carries most of the flavor.
Spoon the ricotta mixture into a large zip-top bag and push it down into one corner. Seal the bag, then snip off a small piece of the tip from that corner to create a makeshift piping bag.
Hold one dry manicotti tube over the bowl (to catch any drips) and gently pipe the ricotta mixture into one end until it’s about halfway full. Turn the tube and fill from the other end until the center is packed but not bursting. Repeat with the remaining manicotti tubes, refilling the bag as needed.
Arrange the filled manicotti in a single snug layer in the slow cooker directly on top of the thin sauce layer. If your slow cooker is deep and you have more tubes than fit in one layer, you can angle a few on top, but avoid stacking more than two layers so they cook evenly.
Pour the remaining marinara sauce evenly over the stuffed manicotti, making sure all of the pasta is coated and no dry spots remain. If needed, gently wiggle the slow cooker or use a spoon to nudge sauce between the tubes so they’re well surrounded.
Cover the slow cooker with the lid and cook on LOW for 3 1/2 to 4 1/2 hours, or until the manicotti are very tender when pierced with a fork and the sauce is bubbling around the edges. The exact time will vary slightly depending on your slow cooker and the thickness of the pasta tubes.
Once the manicotti are tender, sprinkle the remaining 1/2 cup shredded cheese evenly over the top. Cover again and cook on LOW for 15–20 minutes, just until the cheese is melted and lightly bubbly.
Turn the slow cooker to WARM and let the manicotti rest for about 10 minutes; this helps them set up slightly so they hold together when you lift them out. Serve directly from the slow cooker, scooping up plenty of the rich, crimson sauce and melted cheese with each portion.
