In a fry pan, stir seasoning into water; set aside.
Peel and cube potatoes. Microwave in Multipurpose Steamer, covered, on high for 8–10 min.
Meanwhile, drain and rinse lentils. Stir into seasoning mixture in fry pan. Bring to a boil over high heat; reduce heat, and simmer, stirring often for 2 min. Stir in vegetables and heat through.
Using the Ground Meat Separator, mash potatoes with milk. Top lentil mixture with potatoes and serve.