NestedTable = {
    ["TestVar1"] = 1,
    ["TestTablePath"] = {
        ["TestTablePool1"] = {2, 3},
        ["TestTablePool2"] = "This is a test string",
    },

    HeheHaha = {
        bing_bong = "bing bong"
    },

    TestBoi = {},
}

local function table_extend(tbl, element)
    local copy = {table.unpack(tbl)}
    table.insert(copy, element)
    return copy
end

function flatten(value, path, pool)
    path = path or {"root"}
    pool = pool or {}
    pool[path] = value
    if type(value) == "table" then
        for i, v in pairs(value) do
            flatten(v, table_extend(path, i), pool)
        end
    end
    
    return pool
end

local pool = flatten(NestedTable)

for i, v in pairs(pool) do
    if type(v) == "table" then v = "[table]" end
    print(table.concat(i, "/") .. " -> " .. v)
end