Wash and pierce the sweet potato with a fork. Place it on a pan in a preheated 400 degree f oven to bake for 50 minutes to an hour.
1 sweet potato
While the sweet potato is baking, start the water for the pasta. Add 6 lasagna noodles to the boiling water and cook for 8 minutes, drain and rinse in cold water.
6 lasagna noodles
While the pasta is cooking, brown 1 pound of ground turkey with two cloves of chopped garlic. Once the turkey is cooked, turn the heat off.
Once the sweet potato(es) are cooked set them aside to cool
Melt 3 tablespoons butter in a saucepan with the garlic. Once the butter is melted, add the remaining garlic. Turn the heat to low and stir in 3 tablespoons of flour to form a roux which is a paste.
3 tablespoons unsalted butter, 2 cloves garlic
Gradually whisk in the 2 cups of milk by 1/2 cup increments at a time. Stir often. Once the sauce begins to thicken add more milk until the sauce has thickened. Add the nutmeg and reduce the heat to low heat to keep the sauce warm.
2 cups milk
Stir in the Parmesan cheese and turn the heat off.
1/4 cup grated parmesan cheese
Pre-heat the oven to 350 degrees f
Carefully slice the sweet potatoes in half, scoop out the pulp with a spoon and add it to the pan with the turkey.
Add the Greek yogurt and mix all of the ingredients together.
1/2 cup Greek yogurt
Arrange the cooked lasagna noodles on a piece of parchment or a board and add approximately 3 tablespoons of the filling to the top of each lasagna noodle. I like to make separate piles of the filling so that it's easier to spread instead of one big one.
Using an offset spatula, spread the filling so that it covers about 3/4 of the noodle and roll it up.
Place 1/2 cup of the sauce in the bottom of an 8X8 baking dish and place the lasagna rolls on top of the sauce.
Pour the remaining sauce on top of the lasagna rolls, cover and and bake at 350 for 30 minutes. Remove the cover and bake for 10 minutes longer.