Vegetables: Roasted garlic, raw garlic, green onion, shallots, caramelized onions, horseradish root, cauliflower.
Herbs: Chives, parsley, rosemary, sage, thyme, dill.
Spices: White pepper, garlic powder, onion powder, seasoning salt, paprika, mustard powder, cajun seasoning, cumin.
Cheeses: Parmesan, gruyere, goat cheese, blue cheese, feta, smoked gouda.
Sauces & liquids: Buttermilk, sour cream, creamed horseradish, browned butter, creme fraiche, chicken or beef stock, Dijon mustard.
Meats: Bacon, pancetta, prosciutto.
You can also use mashed potatoes to make entirely new dishes like sweet potato gnocchi with brown butter honey sauce. Bake your potatoes instead of boiling for decadent twice baked duchess potatoes or slow cook them alongside cauliflower for a lighter version.