Cool, I think it's awesome that your husband would like to experiment and that you're being so supportive! I'm vegan and here's what I eat:
Breakfast:
I eat this every single day and think it's quite delicious personally

-oatmeal (1/2 cup), blueberries (1/2 cup), strawberries (1/2 cup), and one whole banana (sometimes I also have raspberries and blackberries)
Lunches:
Really depends on the season for me (like in the summer, I just eat a baked potato, a fresh tomato cut up with basil and some salt, and spinach with lemon juice squeezed on it like every day!)
But lunches lately have been:
-chopped salad (lettuce - fresh or I like the boxes with all the different organic greens, tomato, cucumber, carrots, avocado, black beans) and a tortilla with hummus
-soup
-baked potato or sweet potato (I bake a bunch on Sunday usually and keep them in the fridge and microwave them when I need one) with frozen vegetables that I steam
Dinners:
-stir fry: rice and veggies (broccoli, zucchini, mushrooms, stir fry greens like Bok Choy, kale, spinach, etc., carrots, peppers, onions)
-pasta (we usually have it with tomato sauce and broccoli or we'll have orzo with lemon juice, spinach, shallots, artichokes, Kalamata olives, sundried tomatoes)
-soup and salad
-ratatouille
-tostadas (so good! Bake a tortilla, top that with Spanish rice, then put a ton of fresh lettuce on top, then some black beans, some avocado, and put salsa on top)
For snacks, I eat grapes, apples, oranges, strawberries, cucumbers, carrots, pretzels, semi-sweet chocolate chips
As for shopping, for our big weekly trip, I personally go to Whole Foods just because I hate all the other grocery stores around here and Trader Joe's occasionally to get a couple of items in the middle of the week. We stock up on rice, beans, pasta, and canned tomatoes every couple of months and then just buy produce every week.
I know that probably isn't that helpful, but I have a cookbook called 1000 Vegan Recipes that is really good. I'm sure it would be a bit much to invest in for a week, but if you like any specific categories of foods or want to look at the table of contents on
amazon or Google Books or something and like any of the recipes I'd be happy to type any of them up for you!