Haven't tried this but it sounds good:
Toast 1/2 c chopped walnuts in skillet over med heat until fragrant, about 4 min.
Whisk together until thoroughly combined: 1tbs red wine vinegar, 2 tsp fresh lemon juice, 1 med minced shallot, 1 1/2 tbs minced fresh dill, and 6 tbs extra vigil olive oil. Add salt & pepper to taste.
Toss dressing, 1lb. sliced roasted beets, and walnuts together in bowl. Serve!
I also had an easy recipe for pickled beets and of course, can't find it. I seem to remember you heated white vinegar and sugar on the stove in a large saucepan, added the cooked beets and pickling spice, and let it simmer for a half hour or so. After it cooled, you stored it in the fridge. There may have been water in with the vinegar? Anyway, it was easy and I liked it.