This is the green sauce I use- I love it!
Brown ground turkey and drain. Mix cooked ground turkey with beans and taco seasoning.
Stuff mixture into uncooked shells. I use a plastic baggie with a cut corner. Then squeeze the mixture in both sides of the manicotti shell. You could also spoon it in on each side with a very small spoon that will fit into the manicotti shell.
Lay stuffed shells into a 9X13 pan. Mix the green taco sauce with about 3/4 bottle of water. (Use the bottle the sauce came in.) Pour sauce over manicotti, cover with foil, and bake at 350 degrees for 1 hour. Remove from heat and sprinkle with cheese. Put back in oven until cheese is melted without the foil this time.
Garnish with green onions, olives, tomatoes, and cut lettuce.