Preheat the oven to 220 °C / 425 °F. Line a baking tray with parchment or place a baking rack over it.
Prepare the sweet potato steaks: Arrange the slices in a single layer on the tray. Brush with olive oil and sprinkle with smoked paprika, salt, and pepper.
Bake for 30–35 minutes, flipping halfway through, until golden and tender but not mushy.
Pro Tip: For a smoky char, finish the sweet potatoes under the broiler or on a grill pan for 2–3 minutes per side.
Cook the rice noodles according to package directions until just tender. Drain, rinse under cold water, and toss lightly with oil to prevent sticking.
Make the creamy stir-fry sauce: Heat 2 Tbsp oil in a large skillet or wok over medium-high heat.
Add the sliced bell peppers, spring onions, and sesame seeds. Stir-fry for 4–5 minutes, until peppers begin to brown.
Add garlic and sauté 30 seconds, just until fragrant.
Stir in soy sauce, Pad Thai sauce, and coconut milk. Bring to a gentle simmer.
Add chopped basil and let the sauce thicken slightly (3–4 minutes).
Combine: Add the cooked noodles to the skillet and toss to coat in the creamy sauce.
Serve: Plate the noodles, top with grilled sweet potato steaks, and garnish with sliced avocado and extra sesame seeds. Add a squeeze of lime before serving.