Overstuffed, like Ruth said, it's easy to modify those dishes in Phase 2. You can even have the little red potatoes once a month...they'd be very good in pot roast!
For lasagna, in P1, try using long strips of zucchini or eggplant instead of noodles. There are tons of recipes out there that use this technique...try
www.allrecipes.com and
www.cookinglight.com (you have to register but it's free and worth it!) for ideas. In the SBD cookbook, there's a recipe for a chicken and eggplant casserole. I never liked eggplant until I tried this...it's AMAZING! Anyways, it uses eggplant much as you would for lasagna, so you could try using that recipe and combine it with your favorite lasagna recipe. Just make sure you use part skim mozzerella and ricotta, lean ground beef, and that your tomato sauce doesn't have sugar in it (just check the label, many do and some don't).
For spaghetti, in P1, try spaghetti squash. I finally had this when I was in CA last month and it's delicious! It really looks like spaghetti, and if you are involved in a conversation with someone, you may not even know the difference!

In P2, try WW spaghetti, use tomato sauce without sugar, and lean meat for the meatballs (if you do those). Consider adding some veggies in to the sauce in both phases.
Some of my comfort foods are cheesy casseroles with cauliflower and/or broccoli, sauteed cabbage, the turkey cacciatore dish (in our recipe forum under P1), taco bake, chicken divan, soups (especially the Broccoli and Cheese one I posted in P2 soups), White Chili (in P1 entrees or soups in our forum), and as a side dish/snack, refried beans with Lawry's seasoning salt, garlic powder, heated, with salsa and LF cheddar cheese on top. MMMMM!
Hope this helps, hon!