Slice the onions and put them in a cast iron skillet or foil pan. Add the butter, brown sugar, balsamic vinegar, kosher salt, pepper, and crushed red pepper flakes.

Put the skillet or pan on the Traeger grill/smoker set to 250 degrees for about 3 hours. Stir it every half hour.

Note: Cook time will depend on thickness of onion slices and smoker temp, they may be ready before the 3 hour mark or they may take a little longer.

Add the cream cheese, mayo, mozzarella cheese, green onions, and cooked bacon crumbles. Cook on the Traeger still set to 250 degrees 30 to 45 more minutes, stirring a few times.

Once it's all melted together serve with crackers, Fritos Scoops, or toasted French bread.

Note: I sliced a French baguette, brushed each slice with olive oil and seasoned with kosher salt and pepper. Then baked in a 400 degree oven for 5 minutes.