OP - Here are my thoughts...
Overall comments: I can't work out how you are structuring the menu - entree?, mains? desert? There are too many 'fancy' dishes. And there are too many rich dishes. And some of the dishes are very fiddly.
"Smoked salmon on toast, cream cheese, traditional accompaniments" Is this an entree? And why on oast?
"Gooseberry tarts with goat cheese crowns" Is a sweet or savoury dish?
"Arugula, pear, walnut salad" Why Arugla? And what is this an accompaniment to?
"Watercress soup (chilled)" Is watercress easy to obtain? And why chilled?
All of the above dishes are 'fancy' and things that many people might not like. I wouldn't eat any of them.
"Beef stew (hot) with homemade rolls, mushroom butter" Why homemade rolls? And why not just plain butter?
"Scallop and garlic mousse, fried shallots" Is this hot or cold? What accompanies it? And why fried shallots?
"Asparagus, chile hollandaise" Hot or cold? And why 'chile' hollandaise?
Rack of lamb with mint jelly
Potatoes au gratin
Where are the other vegetables?
And what about the vegetarians?
"Cider donuts, powdered sugar" Can't you have these at the basketball game?
"Strawberry sorbet, fudge sauce" Why fudge sauce?
"Drinks: Eggnog spiked with rum, tea, coffee, blueberry or lime cola" Why blueberry? While lime cola?