Toast the farro. Preheat an oven to 425°F (220°C). Bring a large saucepan of water (at least 4-5 cups) to a rapid boil. Meanwhile, place 1½ cups farro in a large skillet over medium heat. Cook, stirring often, until fragrant, about 2 minutes.
Cook the farro. Season the water with a couple tablespoons of salt, then add the toasted farro. Reduce the heat to a simmer, then allow the farro to cook uncovered until tender, about 35-45 minutes, stirring occasionally. Note that farro is heartier grain, so it’ll still have a firmer texture than cooked rice. Once tender, drain over a colander.
Roast the veggies. Place cubed sweet potato and sliced red onion on a rimmed baking sheet, then toss with 2 Tbsp olive oil and ½ tsp Kosher salt. Roast for 20-25 minutes, tossing once halfway through, or until the sweet potato is fork tender.
Make the salad dressing. In a mason jar, combine ⅓ cup extra virgin olive oil, 2 Tbsp fresh lemon juice, 1½ tsp Dijon mustard, 1 grated garlic clove, 1 tsp honey, and ½ tsp Kosher salt. Seal tightly with a lid, then shake vigorously until well mixed. Taste and adjust seasoning to your liking.
Toss with dressing. In a large bowl, combine the warm cooked farro, roasted vegetables, ⅓ cup pepitas (or nuts), 6oz baby spinach, ⅓ cup chopped herbs, and the dressing. Gently toss to combine, then adjust seasoning to taste. You can enjoy this warm, but I prefer to let it sit for 20 minutes and serve it at room temperature.
Add goat cheese, then serve. When ready to eat, transfer to a large serving bowl, then top with 2-3 ounces crumbled goat cheese (as much as you like) and additional fresh dill for garnish. Enjoy!