Make It Now:

1. Brown the Beef: Heat 1 teaspoon of oil in a large skillet over medium high heat, until shimmery. Add the ground beef to the pan and begin to break it up while it browns. Sprinkle the brown sugar and steak seasoning evenly over the meat and continue to stir and break it up until it has browned completely. Remove the meat to a paper towel-lined plate to drain the oil.
2. Saute Veggies: Wipe out the skillet and place it over medium heat. Add the remaining 2 teaspoons of oil to the pan. When the oil is shimmery, add the carrot, onion, red peppers to the skillet. Cook until veggies are tender, about 4-5 minutes. Stir in the garlic, red wine vinegar, and Worcestershire during the last 30-60 seconds of cook time.
3. Simmer Meat Mixture: Stir in the cooked meat, tomato sauce, tomato paste, and maple syrup to the veggies until combined. Reduce heat to a simmer and cook the Sloppy Joe mixture 5 minutes longer. Taste and season with salt, if needed. (Note: This is a good time to toast the buns under the broiler. See Cooking Notes.)
4. Serve: Using a large slotted spoon, pile meat mixture onto toasted bun bottoms. Add a slice of cheese, if desired, and top with bun.

Freeze For Later: Follow Steps 1-3 and let the Sloppy Joe mixture cool. Place in a freezer bag or freezer-safe container. Try to remove as much air as possible and seal tightly before freezing.

Prepare From Frozen: Thaw the meal using a safe thawing method. Warm the meat mixture over medium-low heat on the stove or on Low in the slow cooker, gently stirring until heated through. (Tip: Add chicken or beef broth if it needs more liquid.) Follow Step 4.