Preheat oven to 350° F.
Brush cups of mini-muffin pan with half of vegetable oil. Press wonton wrappers into mini-muffin pan cups. Brush with remaining vegetable oil. Bake for 6 minutes or until lightly brown. Set aside. (See Tip 3)
Cook macaroni in salted boiling water for 7 minutes. Drain in colander. Transfer to large mixing bowl.
While macaroni is still hot, add butter and cream cheese. Stir to melt butter and cream cheese and evenly coat macaroni.
Add milk and egg; stir to evenly coat macaroni.
Add dry mustard, ¼ to ½ teaspoon of salt, and ⅛ teaspoon freshly ground black pepper; stir to combine.
Add 1 ½ cups Cheddar cheese and Gruyère cheese; stir to combine.
Spoon macaroni mixture into wonton wrappers in mini-muffin pan. Top with reserved Cheddar cheese and crumbled bacon. (See Tip 4)
Bake in preheated 350° F oven for 12 to 15 minutes, or until wontons are golden brown, the tops are and bubbly and the macaroni is set.
Remove from oven; cool 5 minutes before removing from pan to wire rack to continue cooling.
May be served hot or warm, refrigerated and reheated, or frozen and reheated. (See Tip 5)
Yield: 48 Wonton Mac & Cheese Bites. (See Tip 6)