Appetizers you can make in a pinch

My sardine pate, https://food52.com/recipes/16274-lemony-sardine-pate. It's a pantry item for the most part and it takes less than 5 minutes to blitz in a food processor and serve.

Your question says both "in a pinch" (headline) and "quickly" (intro note).
So I'm leaning towards the "in a pinch" part.
Any carb base you have in the house with any compatible topping, such as
* bruschetta, olive oil, garlic, tomato;
* mini baked or round potatoes with a dairy topping;
* cheese board with crackers;
* spaghetti aglio olio (maybe served in little cups).

Radish wedges with butter and salt, good cheese and bread, a radish top pistou to drizzle on any/all of it. Maybe some grapes? Hmm, that’s starting to sound like lunch!

Feta mixed with honey, good bread, dried figs, walnuts or pecans (toasted if there’s a little time, spiced and toasted if there’s a little more time). Maybe a little arugula tossed in a simple vinaigrette as well.

Blistered shisito or pardon peppers with salt, good bread and cheese, olives.

Ooh, my favorite is dates (split open and remove the pit), then stuff with a slice of sharp cheese (parmesan, manchego, aged cheddar), a thin slice of celery (optional), and top with olive oil, flaky salt, and paprika!