Allow Pioneer Simple Split Waffle Biscuits to stand at room temperature for a minimum of 2 hours. Waffle biscuits can also be refrigerated up to 36 hours prior to baking.
Preheat a standard oven to 425°F, or convection oven to 350°F. Line a rimmed baking sheet with parchment paper. Place waffle biscuits on a prepared baking sheet and brush with butter substitute. Bake in a standard oven for 4-5 minutes, or a convection oven for 5-6 minutes. Remove from oven and brush again with butter substitute. Split the waffle biscuits in half.
Spread the mayonnaise evenly over bottom halves of waffl e biscuits. Spread the mustard evenly over top halves of waffl e biscuits.
Top bottom halves of waffle biscuits evenly with the ham, turkey, cheese and waffle biscuit tops.
Place the sandwiches on prepared baking sheet and bake until cheese is melted and sandwiches are hot, about 1-2 minutes.
Dust the sandwiches with powdered sugar and serve with jam for dipping.
