Mash avocado in a large bowl. Stir tomato, green onions, lime juice, salsa, garlic, sour cream, vinegar, cayenne pepper, and cumin with the mashed avocado until evenly mixed; season with salt and black pepper.
Cover bowl with plastic wrap and refrigerate until the flavors blend, about 30 minutes.
Tips & Tricks
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This simple, creamy appetizer takes its cue from English tea sandwiches.
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Sugar, cinnamon, and chili powder give roasted almonds an addictive kick.