Part 1: Preparing and Baking the Sweet Potato Fries

1. Preheat Your Oven: Position an oven rack in the center of the oven and preheat to 425°F (220°C). Line two large baking sheets with parchment paper for easy cleanup and to prevent sticking. Using two sheets is crucial to avoid overcrowding the fries, which helps them crisp up.
2. Prepare the Sweet Potatoes:

   • Wash and scrub the sweet potatoes thoroughly. Peeling is optional; the skin contains nutrients and can add to the texture, but some prefer them peeled for a smoother fry.
   • Trim off the ends of the sweet potatoes.
   • Cut the sweet potatoes into uniform fry shapes, about 1/4 to 1/3-inch thick and 3-4 inches long. Uniformity is key for even baking. You can cut them into classic sticks, wedges, or even crinkle-cut if you have the tool. Thinner fries will be crispier, while thicker ones will be softer on the inside.

3. Soak (Optional, for Extra Crispiness): For even crispier fries, you can soak the cut sweet potatoes in a large bowl of cold water for at least 30 minutes, or up to an hour. This helps remove some of the excess starch. If you do this, make sure to drain them thoroughly and pat them completely dry with paper towels or a clean kitchen towel. Any residual moisture will steam the fries instead of crisping them.
4. Season the Fries:

   • In a large bowl, combine the dried sweet potato pieces (if soaked) or the freshly cut pieces.
   • Drizzle with olive oil and toss well to ensure every fry is lightly coated.
   • If using cornstarch, sprinkle it over the oiled fries and toss again until evenly distributed. The cornstarch will absorb some surface moisture and create a light, crispy coating.
   • Add the smoked paprika, garlic powder, onion powder, salt, pepper, and optional cayenne pepper or dried herbs. Toss thoroughly until the fries are evenly seasoned.

5. Arrange on Baking Sheets:

   • Spread the seasoned sweet potato fries in a single layer on the prepared baking sheets. Make sure there is space between the fries. Overcrowding will cause them to steam and become soggy rather than crispy. Use two baking sheets if necessary.

6. Bake to Perfection:

   • Place the baking sheets in the preheated oven.
   • Bake for 15-20 minutes.
   • Remove the baking sheets from the oven and carefully flip the fries using a spatula. This ensures even browning and crisping on all sides.
   • Return the fries to the oven and bake for another 10-15 minutes, or until they are tender on the inside and nicely browned and crisped on the edges. Keep an eye on them during the last few minutes, as oven temperatures can vary and thinner fries will cook faster. They should be golden brown with some slightly darker, caramelized spots.

7. Cool Slightly: Once baked, remove the fries from the oven and let them cool on the baking sheets for a few minutes. They will continue to crisp up slightly as they cool.

Part 2: Making the Creamy Avocado Dip

1. Prepare the Avocados: While the fries are baking, prepare the avocado dip. Cut the ripe avocados in half lengthwise, remove the pits, and scoop the flesh into a medium-sized bowl.
2. Mash the Avocado: Add the freshly squeezed lime juice to the avocado flesh immediately. The acid will help prevent browning. Using a fork, mash the avocado to your desired consistency. For a chunkier dip, mash lightly. For a smoother dip, mash more thoroughly. You can also use a potato masher or even a food processor for an ultra-smooth, whipped texture.
3. Add Flavorings: Add the chopped fresh cilantro, minced garlic, optional minced jalapeño, and optional minced red onion to the mashed avocado.
4. Season and Mix: Sprinkle in the salt and pepper. Stir everything together gently until well combined.
5. Taste and Adjust: Taste the dip and adjust seasonings as needed. You might want more salt, lime juice for extra tang, or a bit more cilantro or jalapeño for an extra kick.
6. Adjust Consistency (Optional): If the dip is too thick for your liking, you can stir in a teaspoon or two of cold water or olive oil until it reaches your preferred consistency.
7. Serve or Store: If serving immediately, transfer to a serving bowl. If making ahead, press a piece of plastic wrap directly onto the surface of the dip, ensuring no air pockets, to minimize browning. Store in the refrigerator for up to 2-3 hours. The lime juice will help, but avocado dips are best enjoyed fresh.