In Dutch oven/stock pot, add first 3 ingredients & cook on medium until almost translucent. Add Italian seasoning, salt & pepper, crushed red pepp. Add broth, bring to a boil; Then add tomatoes. Pulse/blend all together to desired consistency. Add agave/sugar, basil leaves, & pulse again. Simmer on medium/low heat for about 20-30 min. Stir in a dollop of sour cream for extra richness.