Zucchini and potato soup with cilantro

I found this recipe in an old magazine and it is online. It is a good end of summer soup. We'll make it in my seasonal cooking class.

3 tablespoons butter 1 tablespoon (or more) chopped jalapeño chile with seeds 1/4 teaspoon (generous) fennel seeds 1 (7- to 8-ounce) Yukon Gold potato, peeled, cut into 1/2-inch cubes 16 to 18 ounces zucchini (about 4 medium), trimmed, cut into 1/2-inch rounds 1 cup chopped green onions 2 1/2 cups low-salt chicken broth 1/2 cup (packed) fresh cilantro 1 teaspoon (or more) fresh lime juice Melt butter in heavy large saucepan over medium-high heat. Add chile and fennel seeds; stir 30 seconds. Add next 3 ingredients; sauté 2 minutes. Add broth and bring to boil. Reduce heat to medium-low, cover, and simmer until vegetables are tender, about 15 minutes. Purée soup in batches in blender, adding cilantro and 1 teaspoon lime juice to first batch. Return puree to same pan. Season to taste with salt, pepper, and more lime juice, if desired. Rewarm, if necessary, and serve. One serving contains the following: 163.56 Calories (kcal), 48.7% Calories from Fat, 8.85 (g) Fat, 5.62 (g) Saturated Fat, 25.63 (mg) Cholesterol, 16.74 (g) Carbohydrates, 3.29 (g) Dietary Fiber, 4.10 (g) Total Sugars, 13.45 (g) Net Carbs, 4.89 (g) Protein **Really quite nice! The lime added a little kick. The picture doesn't show it with the cilantro- but I'd recommend it. We made it with green chili instead of a jalepeno. We also used 1/2 the potato.