Sweet Potato Spinach & Mushroom Lasagna

Oh how I love lasagna! I think it was the first meal I ever learned to make. It took a lot of years and lots of different methods but I’ve got a go to method now and it’s pretty fool proof I think. The absolute key to a delicious lasagna is the sauce you use. That’s where all the flavour is. Béchamel is a must. Rather than cramming tons of cheese between each layer, spread a bit of creamy goodness along with your tomato sauce. Speaking of tomato sauce, you can follow my marinara recipe, use your own or even use a good jar of store bought.

The days of having to boil your lasagna noodles are long gone. I prefer the premium lasagna brands with shorter sheets but you can use any brand you like. Don’t skimp on the sauce when using no boil pasta as it needs liquid cook in.

Let’s talk cheese. I always use freshly grated Parmesan or Grana Padano in my béchamel and between my lasagna layers. For the top layer choose something mild and melty like a good mozzarella or provolone.

Reserve some of your veggies to add to the top for presentation.

Prep time: approximately 30 minutes

Baking time: 45 minutes

1 500 gram package of no boil lasagna noodles

2 sweet potatoes

3 cups fresh spinach washed and stems removed

4-6 portobello mushrooms cleaned with gills removed

5 cups marinara sauce

4 cups bechamel sauce

2 cups grated Parmesan cheese

2 cups grated or 8 slices mozzarella or provolone cheese

Salt,pepper & oregano to season (optional)

For the bechamel:

1/4 cup (1/2 stick) unsalted butter

1/2 cup all purpose flour

4 cups milk

1 teaspoon kosher salt

1/2 cup Parmesan cheese

1/4 teaspoon nutmeg

Preheat oven to 375 degrees

Peel and slice the sweet potatoes about 1/4 inch thick and place them on a parchment lined baking sheet. Lightly brush the slices with olive oil on both sides and season with kosher salt and pepper.

Bake for 20 minutes, flipping them over after 10 minutes.

Slice the cleaned portobellos toss them with about 2 tablespoons of olive oil and lay them in a single layer on a baking sheet. Place them on the bottom rack of the oven for 15-20 minutes. If you find they have released liquid don’t worry add it to the lasagna. Since I’m already roasting the sweet potato I do the mushrooms this way. Fell free to sauté them in a pan if you find that easier.

While the veggies are roasting, prepare the béchamel. In a medium sauce pan melt the butter on medium heat. Once butter has melted and starts to bubble add flour and whisk to form a paste (roux). Add half of the milk and whisk until mixture thickens. It should be pretty thick at this point. Add the remaining milk continuing to whisk until it returns to boil and thickens a bit. Remove the pot from the heat and add salt , cheese, nutmeg and mix well.

Reduce oven temperature to 350

Grease a 9 x 13 baking dish with cooking spray. Spread 1/2 cup of the tomato sauce evenly on the bottom of the baking pan. Layer your lasagna sheets(3-4) to cover the bottom. Add another 1/2 cup of sauce, 1/2 cup of bechamel, 1/4 cup Parmesan cheese. This will be your formula for each layer of your lasagna. *tip: If you find you need to stretch your tomato sauce simply add a bit of water to it.

On layer 2 cover sauce with half of the spinach

Layer 3 add the sliced sweet potato

Layer 4 add the sliced mushrooms

Layer 5 add remaining spinach

Layer 6 tomato sauce / bechamel and parm

Top with more noodles spread the rest of the bechamel, Parmesan and top with the 2 cups of shredded or sliced mozzarella.

I like to season the top with salt, pepper and oregano but it’s optional.

Bake uncovered for 45 minutes. Let the lasagna rest for at least 20 minutes before serving. Enjoy!

4 thoughts on “Sweet Potato Spinach & Mushroom Lasagna

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