I seem to recall cucumber sandwiches being a fairly standard British tea-time type of snack. Not toasted, though. White bread-type bread with the crusts cut off, lightly buttered. I also see them occasionally at South Asian lunches, similarly served with crusts cut off, but with a green chutney or sandwich spread in them.
Buttered saltines. Great little salty snack.
Radishes on buttered white bread are also delightful.
Cucumber sandwiches are delicious with a shmear of cream cheese. 
I learned about them when I read The Mad Scientists’ Club back in sixth grade.
Mushrooms. Various types and sizes depending on usage.
I put them in a variety of dishes, even when they’re not called for in a recipe. They are my second favorite pizza topping (after anchovies). I love well-constructed portobello mushroom cap burgers sauteed with balsamic vinaigrette and gooey cheese even better than a gourmet hamburger. And they are great simply pan-fried in butter and garlic.
I’m a umami-lovin’ fungiphile.
Wait, you freeze cole slaw?
@needscoffee That’s what I said when my mom told me about it.
Yes! I love buttered saltines. I also like them with peanut butter.
Philadelphia Cream Cheese, too. Try spreading on matzo crackers for more surface area!
I read online that you can freeze coleslaw, (without dressing, needless to say). I think it would lose its crunch after thawing, but it’s a thing, freezing shredded cabbage/carrots.
This website says you can freeze it with dressing, as well.
Can You Freeze Coleslaw? - Mica Restaurant.
Blackberries. Blackberries contain all six flavonoids. As far as I’ve read, no other food source contains more than 2.
Google:
Flavonoids help regulate cellular activity and fight off free radicals that cause oxidative stress on your body. In simpler terms, they help your body function more efficiently while protecting it against everyday toxins and stressors.
Flavonoids are also powerful antioxidant agents. Antioxidants help your body fight off potentially harmful molecules that can be introduced to the body. Your body produces antioxidants naturally, but they’re also found in dark chocolate, legumes, and many fruits and vegetables.
Inflammation is one of your body’s immune responses. Allergens, germs, toxins, and other irritants can trigger inflammation that results in uncomfortable symptoms.
A vinegar based coleslaw dressing, maybe. I wouldn’t freeze coleslaw with mayonnaise.