It may be a phony Capitalist commercial day invented by Hallmark to sell their stupid cards, but we Americans are generally forced to observe it now. That's ok, but every day should be Mother's Day (and Father's Day too). It's #6 in God's Ten Suggestions.
We'll have 3 mothers here for lunch, along with misc. other family. I'm cooking of course, but maybe a daughter or two will lend a hand. Darn well had better do, with 10 or so of us here.
My simple rustic American menu:
Grill: A few fat one-and-a-half-inch thick Costco ribeyes - or maybe butterflied lamb
Creamed spinach and/or grilled vegetables with olive oil. (I usually grill onions, sweet peppers, yellow and green squash, mushrooms, maybe some asparagus or eggplant, and toss in a bowl with oil, basil, parsley, and salt and pepper.)
Mashed taters
Sliced tomatoes/vinaigrette
Beer/wine/lemon Perrier/Lemonade
A Trifle for dessert, with Bird's Pudding (but no sherry, rum, or Riesling to flavor the Pound Cake - makes it better but we have some careful teetotalers and kids). Somehow, I have two large English glass trifle bowls. (For a very large crowd, a punch bowl works well but it takes a lot of stuff to fill a punch bowl and it doesn't really fit in the fridge, so for over 15 people best to use individual stemmed glasses)
Strawberry, Blueberry, Kiwi, Raspberry, Banana is my plan. A good few hours in the fridge is good for a trifle.