Preheat the oven to 400°F (200°C). Line a baking sheet with parchment.
Toss sweet potato and rutabaga fries with olive oil, garlic powder, paprika, salt, and pepper. Spread in a single layer.
1 small sweet potato, 1 small rutabaga, 1 tbsp olive oil, ¼ tsp garlic powder, ¼ tsp smoked paprika, ⅛ tsp salt, ⅛ tsp pepper
Roast for 30–35 minutes, flipping halfway, until golden and crispy at the edges.
While the fries are roasting, prepare the quick pickled red onion: In a small bowl or jar, combine vinegar, warm water, sugar, and salt. Stir until dissolved. Add sliced red onion and let sit at room temperature for at least 20–30 minutes, stirring occasionally.
¼ red onion, 2 tbsp apple cider vinegar, ¼ cup warm water, ½ tsp sugar, 1 pinch salt
Prepare the mushroom gravy by heating oil in a small saucepan. Add garlic and mushrooms, and sauté until golden (5–7 minutes).
1 tsp olive oil, ½ cup mushrooms, 1 clove garlic
Add broth, soy sauce, and thyme. Simmer for 3–4 minutes.
¾ cup vegetable broth, 1 tsp soy sauce, ½ tsp thyme
Prepare a slurry by mixing together 1 tsp cornstarch with 1 tbsp of water. Stir in slurry and simmer until thickened.
1 tsp cornstarch
Plate the fries. Top with warm gravy and scatter cheese cubes/curds on top.
¼ cup mozzarella
Drain pickled onions and place a few slices on top for a tangy crunch.
Sprinkle with fresh chives. Serve immediately.
1 tsp chives