went to make this at one of my daughters and read add milk hmmmm didn't remember seeing milk so checked out the original recipe and yes you should put milk in it

Muffin Tin Tater Tot Hot Dish Cups if was from Betty Crocker according to the post
12 doz. mini potato nuggets (144 nuggets) oh forgot didn't realize that it was mini we had regular so used 6 per muffin tin cup
1 egg slightly beaten
2 C. shredded cheese
1/4 C. milk
8 oz. sliced mushrooms chopped
1 lb. ground beef
1 tsp. Montreal Steak seasoning
1/4 C ketchup
1 T. Sriracha Sauce
Heat oven to 400 F. spray 12 muffin tin cups. place 6 mini potato nuggets in each cup. bake 20 mins. cool 5 mins. then press into bottom of cups to create a base and to absorb any excess oil.
in large bowl mix milk, egg and cheese.
Cook beef over medium heat until brown. remove from heat. drain if needed wipe out pan add mushrooms and Montreal steak seasons to dry skillet cook over medium heat for 6-7 mins. Stirring frequently until slightly browned. cool 2 minutes. add beef and mushrooms to egg mixture mix..put in the cups with the smuched down tater tots top with 6 more tots bake for 32-35 mins or until set and browned cool 15 minutes...mix ketchup and Srircha sauce serve with the hot cups..
I also chopped up some onion and a clove of garlic and cooked with the meat
they don't do mushrooms here so wasn't used i just put the Montreal Seasoning in with the beef...and to taste...I think it would be done faster than the 32 min. actually think I set the timer for 30 think they were still a bit over done....I wrote this down as it said even though I used regular size tots so used less
I thought it was good would make it again looks like something that would keep and reheat going to mention this to my daughter for her college son..oh yes one more thing when I did the ketchup just had hot sauce and just added enough till it tasted good but wasn't too hot for us gringos
sheila