Since mangoes are in season now:

Green mangoes (still crunchy) with crushed Thai pepper and sugar and a tiny pinch of salt.

Or just go all out and make the crack sauce.

Avocado and Worcestershire sauce

Youve heard poutine which is fries with cheese and gravy. Next time try fries wth cheese and salsa.

Curried rice with chicken, dried cranberries, and pistachios

I've been looked at weirdly for dipping pretzels in mustard.

Dip your pretzel sticks or Salzstangen in mustard.

Trust me and thank me later.

Crunchy peanut butter and banana sandwich. Bonus if you add honey.

It's not something for me now that I'm older but I use to love putting ketchup on mashed potatoes and mac and cheese. I know mac and cheese with it is somewhat common.

Also potatoes on a hamburger is really good. If you do a cheese burger it might take some trial and error on getting the right cheese. I myself like fresh shredded American. Don't use cheap ingredients though! This is the 1 thing I wouldn't cheap out on.

Dry roasted peanuts and fresh tomato

Based on this thread peanut butter or peanuts goes with a lot more than expected.

Potato chips dipped in peanut butter or yellow mustard. Malt vinegar on eggs. Waldorf salad.

Chicken Shack Broasted Potatoes with their Cole Slaw mixed in.

It's so good, it's the main thing I get there, it's better than the chicken.

It's like going to Red Lobster and just ordering the cheddar bay biscuits.

Nutella on a salty cracker, like a saltine. Careful, you can eat half a jar this way!

Sriracha sauce on a hot dog, period.

Peanut butter and banana sandwich.

Peanut butter, jalapenos, and your fingers. Get to dipping.

Chocolate Stout beer and a scoop of vanilla ice cream (gently lowered -- otherwise it's all foam gushing about).

I take no credit. A deadhead, traveling beer blogger in a Winnebago (how he described himself) told me about it years ago.

Beer float.

Gingerbread cookies with blue cheese

I just had Mac n cheese with green Chile and meatballs. I liked it 👍

A scoop of vanilla ice cream, topped with a little “chili crunch” oil - salty and sweet, spicy and creamy… it’s great.

Roasted peanuts goes good with most salty foods. Crush and sprinkle it on top of some beef or chicken for a nice, tasty crunch.

Squeeze of lime on hot, salty French fries.

Not very unusual, but also not super common: Emmental and strawberry jam bread rolls.

I don't know anyone who does this, but I love putting barbecue chips on cheese and mustard sandwiches. Same with spicy chips.

Slice of bread and table syrup (not maple syrup). Super quick, sweet snack. I call it the poor man’s pancake.

Not sure whether it's unusual, but at least it took many years to be introduced to combining any chocolate dessert with red wine.