Sweet Potato Rosti Stack

Ingredients⁠:
1 small sweet potato, about 10 1/2 oz (300 g)⁠
4 large organic eggs, divided⁠
1 garlic clove, finely minced⁠
1/4 tsp freshly ground black pepper, plus extra for garnish⁠
3/4 cup diced tomatoes⁠
1/2 cup cooked black beans⁠
1/4 cup chopped kimchi⁠
2 Tbsp fresh cilantro leaves, chopped⁠
1 Tbsp lemon juice⁠
1 Tbsp w