Salmon Broth Minestrone With Eggless Farfalle

Name: Salmon Broth Minestrone With Eggless Farfalle
Ingredients: 1 3/4 c. durum flour; 1/2 tsp. kosher salt; 1/2 c. boiling water, plus more as needed; 3 plum tomatoes; 2 cloves garlic, grated; 3 1/2 c. salmon broth; 1/2 tsp. ground white pepper; 1/2 tsp. freshly ground black pepper; 1 tbsp. miso; 1/8 tsp. MSG; 1/4 tsp. ground green Szechuan peppercorn; 1/2 carrot, chopped; 3/4 c. chopped jicama; 1 jalapeño, thinly sliced; 1/2 onion, diced; Kosher salt; Freshly chopped herbs, for serving (optional)