Halal Cart-Style Cauliflower Bowl

Ingredients

• 1 tsp. kosher salt, plus more
• 1 c. brown rice
• 2 tsp. dried oregano
• 2 tsp. ground cumin
• 1 tsp. smoked paprika
• 1/2 tsp. ground allspice
• 1/2 tsp. ground turmeric
• 1/2 c. extra-virgin olive oil, divided
• 2 tbsp. plus 1 tsp. fresh lemon juice, divided
• 1 head cauliflower, cut into medium-size florets
• Freshly ground black pepper
• 1/2 medium red onion, thinly sliced
• 2 c. halved cherry tomatoes
• 1 tbsp. red wine vinegar
• 1 tbsp. plus 1/2 tsp. finely chopped fresh mint, divided
• 1 tbsp. plus 1/2 tsp. finely chopped fresh parsley, divided
• 2 tsp. finely chopped garlic, divided
• 3 tbsp. coconut yogurt
• 1 tbsp. tahini
• 1 tbsp. vegan mayonnaise
• Thinly sliced lettuce, pita chips, and harissa or hot sauce, for serving