Fancy looking, but easy-to-make lasagna

One of the first meals I've ever made for my fiancee was a pinwheel vegetarian lasagna. It's easy and impressive looking, and, most importantly, tasty. 

Saute some red onions, garlic and cremini mushrooms and then throw in a bag of pre-cleaned spinach once the rest of veggies are almost done. Salt and pepper to taste. Take your veggie mix and add it a bowl with ricotta cheese sprinkled with some of that handy Italian seasoning. 

Spread your lasagna strips out and put three dollops of the cheese and vegetable mix evenly spaced out across the noodle. Roll one end towards the center so that it forms a pinwheel. Layer a pan with tomato sauce and place each completed lasagna pinwheel in nice tidy rows. Throw another layer of tomato sauce over it all and sprinkle a layer of mozzarella over everything. Bake at 370 for about 45 minutes.