Oh nice, that's such a win when a ferment turns out just right! Did you use the brine for anything, or just the carrots themselves? I love that salty, tangy liquid in salad dressings or to splash into soups. For the carrots, I'd chop them up and throw them on top of a grain bowl with some chickpeas and greens. The crunch and punch would be perfect there. What other veggies did you have going in the jar with them, or was it just straight carrots?
It's always a relief when a batch doesn't go bad. I used the brine to marinate some tofu before baking it, which worked really well. The jar had carrots, a few garlic cloves, and some dill.