1. Toast pecans in a skillet over medium heat, stirring occasionally, for about 8 minutes, or until starting to brown. Remove from pan and set aside to cool.
2. Remove stems from kale, and thinly slice the leaves. Add the leaves to a large bowl. Top with peach slices, halved cherry tomatoes, sliced red onion, crumbled blue cheese, and toasted pecans.
3. Put all dressing ingredients into a small mason jar or bowl. Shake/whisk to combine, then pour over salad. Serve immediately, though leftovers are still good up to 1 day later if dressed. Without dressing, salad will last for 4-5 days in the fridge. Pecans will be crunchiest if left off the salad and added when ready to serve, if you're making this several days in advance.