Heat 1 tablespoon of olive oil in a large skillet over medium heat. Add the roasted garlic and sauté until fragrant, about 1 minute. This step enhances the garlic's sweetness, infusing the oil with flavor.

Add cauliflower florets to the skillet, stirring to coat them evenly with the garlic-infused oil. Cook over medium heat for 2-3 minutes, allowing the cauliflower to begin softening. As it cooks, you should notice a mild, nutty aroma developing, indicating the garlic is blending with the cauliflower.

Pour in the vegetable broth and cover the skillet. Steam the cauliflower over medium heat for 10-12 minutes, or until tender. The florets should be easily pierced with a fork, indicating readiness.

Transfer the steamed cauliflower to a food processor. Add the remaining tablespoon of olive oil, Parmesan cheese, salt, and pepper. Blend until smooth, scraping down the sides as needed for even consistency.

Sample the mashed cauliflower to ensure the seasoning is balanced. The texture should be smooth and creamy, with the garlic adding a subtle aroma. If needed, adjust the salt and pepper to taste, ensuring the flavors are harmonious and the garlic remains a gentle undertone.

If the mash is too thick, add a tablespoon of warm broth or milk, blending again to reach the desired consistency. Avoid adding too much liquid to prevent a watery texture.

Transfer the mashed cauliflower back to the skillet, setting it over low heat. Stir gently and continuously for 2-3 minutes. This will help warm the mixture evenly and allow any excess moisture to evaporate, resulting in a thick and smooth consistency. Avoid overheating to prevent drying out.

Just before serving, gently stir in the lemon juice to the mashed cauliflower. This step enhances the dish by introducing a refreshing citrus aroma that complements the garlic's depth. Ensure the lemon juice is evenly distributed, creating a harmonious balance of flavors and preventing any overpowering taste from dominating the dish.

Transfer the mash to a serving bowl and garnish with chopped chives. The fresh herbs add a pop of color and a subtle onion flavor that complements the dish.

Transfer the mashed cauliflower to a serving dish immediately. Ensure it is warm, with a smooth and creamy consistency. The aroma of garlic should be noticeable, enhancing the dish's appeal. Serve as a side dish, complementing your main course with its inviting texture and subtle garlic fragrance.