Cantrips: fire bolt, light, mage hand, prestidigitation, shocking grasp (Note: I can cast any cantrip from the wizard's spell list with a DC 10 Arcana check once per long rest, thanks to a Hat of Wizardry)
fire bolt: Bit harder with this one, but I could see it being repurposed as a flare to signal your location; starting a fire in camp (since
prestidigitation is only for candles and the like); breaking ropes; I can't think of much else, this is pretty purely offense-focused
light: putting it on a stone to throw ahead of you so you can see an area (or down into a pit etc.); leaving it as a marker so you know where you've been, at least for an hour; having a "hooded lantern" with a light pebble inside; making a primitive alarm by covering a lighted object with something opaque that can be pulled away by an intruder
mage hand: literally anything you could do for fun with telekinesis, like pranks, reaching high places, pulling objects to you without getting up, etc.; using it to multitask (e.g. stir a broth while you fry the shrimp), or to provide that critical "third hand" when you're working with something (e.g. holding an object in place, pulling on something from a different direction); using it to scratch an itch you can't reach yourself
prestidigitation: obtain or construct an exactly 1 cubic foot box (preferably collapsible) and fill it with dirty clothes, that's your instant laundromat; as you say, flavoring food, but also reheating it if it's cold or chilling it if it's warm; summoning to hand small useful tools, like quills, screwdrivers, chisels, utensils, cups, all sorts of basic objects that can aid your daily life and then disappear; making a quick seal/stamp/marking device that identifies you personally; marking documents or maps in a non-permanent way for easier communication or pathfinding; play back memories ("an...illusory image that fits in your hand") rather than trying to describe what you saw. Probably a LOT more,
prestidigitation is probably one of the most powerful cantrips ever created and any spellcaster with access to it should absolutely be using it near-constantly outside of combat.
Will do higher-level spells later. Probably only one or two spell levels per post. It's rather a lot to think over.