Preheat oven to 350 degrees F.
In a small bowl, mix the cream cheese, mayo, Parmesan, cream, salt, pepper, garlic powder, and onion powder together.
In a large bowl, combine the broccoli, cauliflower, and tuna.
Pour in the cream sauce and stir well to combine.
Pour the mixture into a 9 x 13 inch baking dish.
Place into preheated oven and bake for 30 minutes, or until heated through and bubbly on the sides and the broccoli is tender (pierce with a fork to test).
Remove from oven and set broiler to high.
Sprinkle the cheddar on top of the casserole and top with bacon.
Return to oven for 2 – 3 minutes, until the cheese is melted and bubbly.
Time: 40 – 45 minutes
Rich sources of (select RDA info): B12 31%, Niacin 32%, vit C 86%, vit K 64%, calcium 32%, selenium 72%