Cold zucchini soup - Next time, use one lemon and one clove of garlic. Two is too much. It also needs a base note, maybe some pine nuts?

Rosemary parmesan focaccia - to keep focaccia dough overnight, flatten it down after the first rise, divide in half, and put each ball in a ziploc to chill until the next day. Bring to room temp before stretching and baking.

Red potato tart with blue cheese and rosemary - Make sure to boil the potatoes until really tender, not just al dente. They don't soften as much in the oven as you think they will. Also, maybe change the custard to be eggier, more quiche-like. It's a little runny as written.

Note for rice and beans - in the future, use pork necks rather than ham hocks for the meat component, as you get more actual meat off the necks at the end.

Summer Dinner Party

Prosciutto-melon skewers: in the future, wrap the melon cubes with ham separately rather than weaving the ham through several cubes on a skewer. It'll be easier to eat that way.
Summer squash soup with mint-parsley pesto
Stuffed baked branzino with lemon-caper sauce, greek salad, rosemary foccacia, green onion and pine nut couscous
Strawberry tiramisu: even though the epicurious comments are full of people whining that the original instructions have too much Cointreau, ignore them. Those commenters are pussies.