Starter ideas with dietary requirements

[Si 330]

Going to friends for dinner, different couples doing each course.
But we have a few restrictions 1 pregnant lady so no shell fish, 1 lady has very bad migraines two foods which trigger these are tomatoes and cheese. Oh and one that doesn't eat red meat.
So with those things in mind anybody got any good ideas, would be good if it could be prepared before hand.

[Papoo]

There's a few curries you could piece together without breaking those rules, great for serving en-masse.

[Piglet]

Smoked salmon with some nice crusty bread and some green salad? Salmon pate? (probably avoid liver pates).

Soup of some sort?