I did this one last year when I had a glut

Spicy Pickled Green Beans
Ingredients:
1 pound very fresh green beans (nice and crisp), ends trimmed
2 cups rice vinegar
1/4 cup granulated white sugar
2 Tablespoons salt
6 small red chillies
1 teaspoon peppercorns
1 lemon, sliced (seeds removed)
Directions:
1. Bring a medium pot of water to boil and blanch green beans until tender-crisp, 2 to 3 minutes. Drain and put in a large heatproof bowl.
2. Bring 2 1/2 cups of water to boil in another medium pot with vinegar, sugar, salt, chillies, peppercorns, As soon as the liquid boils, pour over beans and add the lemon slices. Slit 3 of the chillies to let seeds spill into liquid then add sliced to the beans. Jar

I had pickled spicy asparagus last summer.  It is so surprisingly crisp, really nice appetizer with drinks.