Preheat the oven to 350 degrees F. Spread the chopped almonds out on a baking sheet and bake until fragrant and golden, 5 to 10 minutes. Check frequently, as they can burn quickly. Allow to cool.
Preheat the broiler. Slice the baguette diagonally in 1/4-inch-thick slices, brush with olive oil and place on a broiler pan. Broil until toasted, 2 to 3 minutes.
In a steamer basket set over 1 inch of simmering water, steam the spinach until wilted, a few minutes. Remove the spinach and drain well.
Put the spinach and garlic in a food processor and pulse until smooth. Add in the sour cream, almonds, parsley, thyme, chives, cayenne, and season with 1/8 teaspoon salt. Pulse until combined. Stir in the lemon zest and lemon juice.
Spread the spinach mixture on the toasted bread, sprinkle with additional chopped almonds, and serve.
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