01 - Preheat the oven to 425°F. Line a baking sheet with parchment paper if desired.
02 - Toss the cauliflower florets with 2 tablespoons olive oil, sea salt, black pepper, and smoked paprika until evenly coated. Spread on the prepared baking sheet in a single layer.
03 - Roast the cauliflower for 25 to 30 minutes, tossing halfway through, until golden and tender with lightly charred edges. Remove from the oven and set aside.
04 - While the cauliflower roasts, combine the rinsed brown rice, vegetable broth or water, 1 tablespoon olive oil, and 1/2 teaspoon salt in a medium saucepan. Bring to a boil over medium-high heat, then reduce to low, cover tightly, and simmer for 35 to 40 minutes until the rice is tender and the liquid is fully absorbed. Fluff with a fork.
05 - In a large skillet over medium heat, warm 2 tablespoons olive oil. Add the minced garlic and sauté for about 1 minute until fragrant but not browned.
06 - Stir in the lemon zest, lemon juice, chopped parsley, dill, thyme leaves, and red pepper flakes. Cook for 1 additional minute, then remove the skillet from the heat.
07 - Add the cooked brown rice to the skillet and toss gently to coat every grain with the herb-lemon mixture. Season with additional salt and pepper to taste.
08 - Transfer the herbed lemon brown rice to a serving platter and top with the roasted cauliflower. Garnish with extra fresh herbs and lemon wedges if desired. Serve warm.