Not a recipe so much as a suggestion. Replace half of your potatoes with cauliflower when you’re making mash for more flavor, texture, and a less heavy meal. Here it is in recipe form:
2 lbs starchy potatoes
1 large cauliflower head, cut into pieces
lots of salt
4 Tbsp butter
1/3 c. milk or cream
freshly ground black pepper
(optional seasonings include: paprika, roasted garlic, seasoned salt, etc…)
Peel and boil the potatoes in a large pot of well-salted water as you normally would for making mashed potatoes, but add enough water so that there’s space for the cauliflower. Add the califlower 5-7 minutes before the potatoes will be done and continue boiling. Drain and mash with the remaining ingredients, season to taste.