Slow Cooker Creamy Tomato Soup
Ingredients:
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1 tablespoon extra-virgin olive oil
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2 onions, sliced
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2 cloves garlic cloves, smashed and peeled, or more to taste
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2 (28 ounce) cans Italian-style plum tomatoes, drained
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4 cups vegetable broth
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1 (28 ounce) jar tomato sauce
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6 sprigs flat-leaf parsley
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1 teaspoon salt
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1 teaspoon white sugar
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2 cups half-and-half